Cannot read property 'status' of null

[atvanguard]

job completed
(node:10911) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'status' of null
at Worker._onJobCompletion (/Users/atvanguard/matic/contracts/node_modules/moonwalker/dist/Worker.js:126:21)
at Worker. (/Users/atvanguard/matic/contracts/node_modules/moonwalker/dist/Worker.js:111:30)
at step (/Users/atvanguard/matic/contracts/node_modules/moonwalker/dist/Worker.js:44:23)
at Object.next (/Users/atvanguard/matic/contracts/node_modules/moonwalker/dist/Worker.js:25:53)
at fulfilled (/Users/atvanguard/matic/contracts/node_modules/moonwalker/dist/Worker.js:16:58)
at process.internalTickCallback (internal/process/next_tick.js:77:7)
(node:10911) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:10911) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.